Guess that should be no problem as there are so many users and Accounts that have a donation Adress in there Signature. As i understand the rule "no begging" is meant when you write in your Post " can you please send me some coins" Or asking constant for donations directly.
As long as it is in the Signature it should be no problem.
These messages have a direct request for bitcoins and wallet numbers. Do you say these posts look like begging? Since these two accounts are linked, what happens in such cases?